新手求助:为什么会提示405?
本人新手,在网上找了个servlet+jsp的登录系统,http://localhost:8080/testSevlet/login.jsp 能进去,可是输入用户名密码之后点login却提示 HTTP Status 405 - HTTP method POST is not supported by this URL,
这是login.jsp 代码 找的
<%@ page pageEncoding="UTF-8"%>
<%@ page contentType="text/html; charset=gb2312"%>
<%
request.setCharacterEncoding("gb2312");
%>
<%@ page language="java"%>
<html>
<head>
<title>Login</title>
</head>
<body>
<form method="POST" action="./LoginServlet">
<table>
<tr>
<td width="890" align="left" colspan="2"><b><font size="5">系统登录</font></b>
<hr></td>
</tr>
<%
if (request.getAttribute("error") != null) {
%>
<tr>
<td width=100% align=center colspan=4 height=36><font color=red><b><%=request.getAttribute("error")%></b></font>
</td>
</tr>
<%
}
%>
<tr>
<td width="75" align="center">
<p align="right">ID:</p>
</td>
<td width="809" align="center">
<p align="left">
<input type="text" name="logname" size="20">
</td>
</tr>
<tr>
<td width="75" align="center">
<p align="right">password:</p>
</td>
<td width="809" align="center">
<p align="left">
<input type="password" name="logpwd" size="20"> <input
type="submit" value="Login" name="loginButton">
</td>
</tr>
</table>
</form>
</body>
</html>
accesspage.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录成功</title>
</head>
<body>
<h1>
Hello
<%
if (request.getAttribute("username") != null) {
%>
<font color=red> <b> <%=request.getAttribute("username")%>
</b>
</font>
<%
}
%>
!
</h1>
</body>
</html>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>testSevlet</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet> <description></description> <display-name>LoginServlet</display-name>
<servlet-name>LoginServlet</servlet-name> <servlet-class>Servlet.LoginServlet</servlet-class>
</servlet> <servlet-mapping> <servlet-name>LoginServlet</servlet-name> <url-pattern>/LoginServlet</url-pattern>
</servlet-mapping>
<!--<servlet>
<servlet-name>LogServlet</servlet-name>
<servlet-class>Servlet.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LogServlet</servlet-name>
<url-pattern>/LoginServlet</url-pattern>
</servlet-mapping>-->
</web-app>
DB_Conn.java
package JavaBean;
import java.io.PrintWriter;
import java.sql.*;
public class DB_Conn {
private String driverName = "com.mysql.jdbc.Driver"; // 驱动程序名
private String userName = "root"; // 数据库用户名
private String userPwd = "123456"; // 密码
private String url = "jdbc:mysql://localhost:3306/book"; // 连接字符串
private Connection conn = null; // 数据库连接对象
public Statement sm = null; // 数据库语句对象
private PrintWriter out = null;
// 建立数据库连接
public void ConnectDB() {
try {
Class.forName(driverName).newInstance();
conn = DriverManager.getConnection(url, userName, userPwd); // 获得数据库连接
sm = conn.createStatement();
} catch (Exception e) {
out.print("数据库连接失败!");
}
}
public void CloseDB() {
try {
if (sm != null) {
sm.close();
}
conn.close();
} catch (SQLException SqlE) {
out.print("数据库关闭失败!");
}
}
}
DB_User.java
package JavaBean;
import java.sql.ResultSet;
import java.sql.SQLException;
public class DB_User {
// 创建公用数据库连接类对象
DB_Conn db_conn = new DB_Conn();
// 通过用户名称获取用户信息
public User get(String username, String password) {
db_conn.ConnectDB();
ResultSet rs = null;
try {
String sql = "select * from admin where u_Name ='"
+ username + "' and u_Pass='" + password + "'";
rs = db_conn.sm.executeQuery(sql); // 执行sql语句
User user = null;
if (rs.next()) {
user = new User();
user.setUsername(username);
user.setPassword(rs.getString("u_Pass"));
return user;
}
return user;
}
catch (SQLException SqlE) {
return null;
}
catch (Exception E) {
return null;
}
finally {
// 关闭连接,释放数据库资源:
db_conn.CloseDB();
}
}
}
User.java
package JavaBean;
public class User {
private String username;
private String password;
public String getUsername() { // 用户名称
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() { // 登陆密码
return password;
}
public void setPassword(String password) {
this.password = password;
}
}